Post-treatment of paint industry effluents by filtration using Andropogon biochar (Andropogon gayanus Kunth cv. Planaltina)

  • Argemiro L. Pedrosa
  • Marcelo M. Pedroza
  • Grasiele S. CavalliniEmail author
Research Article


This study evaluates the filtration potential of the biomass obtained from Andropogon grass (Andropogon gayanus Kunth cv. Planaltina) that was converted to biochar by pyrolysis. The biochar is used in filtration systems for the post-treatment of paint industry effluents. The biomass is characterized by elemental analysis (CHSN-O), determination of specific compounds (cellulose/hemicellulose/lignin), FTIR, and SEM. The produced biochar is characterized by SEM, TGA, and surface area analysis. The efficiency of the filters is evaluated by the following parameters: color, turbidity, removal of total solids (suspended and sedimentable), chemical oxygen demand (COD), and metals (Al, Cu, Zn, Co, Cd, and Cr(VI)). Over 99% removal of aluminum, cadmium, and hexavalent chromium is achieved. Moreover, almost 100% of COD and solids are removed, whereas turbidity and color are reduced by over 90%.


Biomaterial filters Slow filtration Slow pyrolysis Heavy metal removal 



We would like to thank Editage ( for English language editing.

Funding information

The development of this research was supported by the Institutional Program of Productivity in Research of the UFT (PROPESQ/UFT).


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Post-graduate Program in ChemistryFederal University of TocantinsTocantinsBrazil
  2. 2.Department of ChemistryFederal Institute of TocantinsGurupiBrazil

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